Venetian blind construction



Oct. 20, 1936. P. H. KUYPERl Re- 20,133

VENETIAN BLIND CONSTRUCTION Original Filed Jan. 15, 1934 2 Sheets-Sheet 1 A oct. 2o, 1936. p. H. KUYPER l Ra 20,133

VENETIAN BLIND CONSTRUCTION y Original Filed Jan. 15, 1934 2 Sheets-Sheet 2 Reissued Oct. 20, 1956 UNITED STATES:l PATENT oFFicE YENETIAN BLIND CONSTRUCTIUN Peter H. Kuyper, Pella, Iowa, assigner Bol screen Company, Pella, Iowa, a corporation oi.

Iowa

Original No. 1,957,272, dated May 1, 1934, Serial No. 706,631, January 15, 1934.

Application for reissue April 21, 1936, Serial No. 75,658 I 29 Claims. (Cl. 156-17) cleaning or painting the blind, or cleaning, re-

pairing'or oiling the operating mechanism for the blind, the removable feature also being desirable so that blinds of different characteristics or color designs can be interchanged readily at will.

Still a further object is to provide casings which vmay be supplied by the manufacturer in successive lengths, for instance in one inch steps, and to provide supporting brackets of different sizes to compensate for fractions of an inch, whereby a blind of one length may accommodate windowframe widths of any range within a quarter and an inch and a quarter greater than the length of the Venetian blind casing itself, thus facilitating installation and keeping the dealers stock on hand to a minimum. l

Still a further object is to provide a Venetian blind having a novel tipping mechanism comprising a pair of rotatable elements with the straps of a ladder tape wound thereon, one clockwise and the other counterclockwise, the tipping or adjusting control comprising means for simultaneously rotating the rotatable elements in the same direction so that one strap winds up while the other one unwinds.

Still a further object is to arrange the straps so that the speed of the one which winds up increases with respect to the speed of the one which unwinds so that the blind slats will be shifted toward the window when adjusting the slats to closed position, resulting in better closure oi' the slats with respect to the window and alsowith respect to each other, the latter result being due to the slats in their finally adjusted position and the entire Venetian blind itself being supported on one-strap only. A further object is to provide raising means for the Venetian blind having a novel lockingL arrangement to prevent lowering of the blind, the

A further object is to provide vnovel characteristics such as latches for the casing with respect to the brackets which support it, pulley arrange-v ments for'the raising ropes, a brake for the roy tatable elements, a disconnecting meansbetween the ladder tapes and the supporting casing and the like.

Still a further object is to provide a housing or casing adapted to completely house and conceal the operating mechanism of the, Venetian blinds lto protect them from accumulation of dust and dirt and at the same time to provide a head member that will be neat in appearance and lend itself to easy installation in a window opening.

Still a further object is to provide a head .lamb assembly for a Venetian blind wherein the operating parts are compact within a housing and can be installed in a window opening as a unit.

A further object is the provision of a sheet.

metal box-like casing to house and conceal the operating hardware oi' a Venetian blind whereby the Venetian blind may be handled as a complete unit and installed without the use of additional wood trim or facie boards or false work.

' anism. The pulley wheels being so arranged with respect to the tilting mechanism that point of connection between the tape ladders and the tilting mechanism permits complete closingof the Venetian blind slats and at the same time the pulley wheels are centered between the sides of the tape ladders and the tape ladders move updownwardly on each side of the pulley wheels.

With these and other objects in view my invention consists in the construction, arrangement and combination of the various parts of my device, whereby the objects contemplatedl are attained, as hereinafter more fully set forth, pointed out in my claims and illustrated in the accompanying drawings, in which:

Figure -1 is an inside elevation of a Venetian blind structure embodying my invention. Figure 2 is a plan view of the same'on the indicating line 2-2 of Figure 1.

Figure 3 is a view similar to the right hand end of Figure 2 illustrating a different adjustment of the blind 'mechanism casing with respect to its supporting bracket.

Figure 4 is a similar view showing a different bracket. Figure 5 is an enlarged sectional view on the line M of Figure 2.

Figure 6 is an enlarged plan view of the right hand end of Figure 2 showing part of the structure broken away and in section.

Figure 711s a sectional view on the line 1-1 of Figure 2.

Figure 8 is a sectional view on the line 8-8 of Figure 6, showing a locking arrangement for the blind raising mechanism.

Figure 9 is a sectional view on the line 9 9 of Figure 6.

Figure 10 is an enlarged sectional view on the line i-III of Figure 2, showing an adjusting drum.

Figure l1 is an enlarged sectional view on the line ii-II of Figure 1, showing the ladder tape supporting and adjusting mechanism.

Figure l2 is a detailed sectional view on the of is indicated at I2. Brackets A are adapted' for support with respect to the window frame and in turn support a Venetian blind mechanism casing B made of a single sheet of metal.

The casing B comprises a bottom wall I4, a back or outer wall i6 and a front or inner wail I8. 'I'he casing B is in the form of a channel and can be made of rather light weight sheet metal with sufficient rigidity arising out of its shape. 4

. Within the casing Il, rotatable elements 20 and 22, such as rods or shafts, are journalled in transverse brackets 24 and 2B. The brackets extend crosswise of the casing and can besufiicient in number to properly support the rotatable elements or the tilting mechanism. 'Each rotatable element 2li and 22 has thereon a. pinion 2l.

'I'he pinions 28 mesh with a pinion 30 which is non-rotatably associated vwith a drum 32. A cord or other flexible element 34 has its center secured as by a cotter key I6 to the drum 32. 'I'he ends of the cord 34 depend from the drum after through a slot 35 and over a roller 2`I`and are provided on their lower ends with knobs 52. The knobs 52 are preferably of metal or other vheavy material to ,maintain the cords taut and also to indicate by their comparative.

elevations which end of the cord is'to be pulled downwardly in order to adjust the slats of the` Venetian blind as desired.

'Ihe `rods 20 and 22 may have a tendency to rotate too freely and to counteract this tendency I provide a brake means in the form of a strip of metal or the like Il frictionally engaging the rotatable' elements. To adjust the frictional effect of the strip Il. I provide a bolt 4I! which can betightened to increase the friction or loosened to decrease it in an obvious manner.

wound on the rod u is a pair or doubled tapes 42 while wound on the rod 22 in an opposite direction is a pair of doubled tapes 44. The tapes 42 and 44 are adapted to support straps 54 of a ladder tape, the rungs oi' which are indiline position of Figure 13 as indicated by the arrow a.

The particular arrangement of the doubled strapsy 42 and 44 (which however can be single with looped ends if desired) accomplishes a very desirable result, especially when associated with the adjusting rods 20 and 22 as disclosed. When the slats B are adjusted to their closed position as shown in Figure 11, the rod 22 is unwound and the rod 2li is wound, bothat the same speed.

. The diameter of the tape 44 on the rod 22, how-- eyer, decreases, while the diameter of the tape 42 on the rod 20 increases so that in the final position, the right hand tape 42 only is supported and supports the strap 54, the rungs 55, the slats 56 and the ropes 50. This places the slats 55 in the closest possibleoverlapping position-that is. as close-as the ropes 60 between thern will permit, as is obvious by a minute 'inspection of Figure 1l.

Furthermore, it will benoted that the entire blind is supported under the rod 2li rather than in a central position below the rods 20 and 22, thus placing the slats 56 as near as possible to the portion II of the window frame, which portion is usually in the form of a ilange surrounding the window itself, the numeral i3 indicating a similar flange at the head of the window. l

The tapes 42 and 44 themselves are secured to .the rods zo and 22 by pins su (see Figure i2) drawn into slots 4B formed in the rods.

The Venetian blind itself includes a plurality of slats 56 made of wood or the like in the ordinary manner and having slots 58 for raising ropes 50 to extend through. The lower slat, indicated at 51, I prefer to make of metal so that it has the same thickness as the lighter slats 56, yet hasl through the slots 5B of the successive slats 55. The ropes then extend over pulleys 62 and thenl around pulleys 64 and 66. The pulleys 64 and .68 are housed in a channel-shaped bracket 6B in which is also journaled a pulley 1li. The ropes 60 extend over the pulley 10 and then downwardly through an opening 1|.,in the bottom i4 of the casing B.

A pulley 12 is provided under which thev ropes 50 may be swung outwardly from the window frame when raising the Venetian blind without unduly channg the ropes or causing them to jump 9E the pulley 10.

The right hand bracket 2B is provided with a notch 8| for one of the ropes to extend through before it reaches the pulley 88. f

While I have shown two tape ladders 54 on the drawings, it will be understood, however, that any number more than two can be used. 'I'he use of a housing or casing madeof sheet metal with a tiltingmechanism therein that can have as many bearings as necessary enables me to make a Venetian blind of great widthl yet properlyl supported without danger of sagging. 'I'he tilting mechanism, it will be noted, has a bearing closely adiacent the point of attachment of the tape ladders to the tilting mechanism, thus permitting a small diameter rod to be used as the tilting mechanism. The rod need be strong enough to rotate as a result of rotation imparted at one of its ends.

Its load supporting strength due to the bearings by the ropes 88 to any desired position and a rope 18 attached to the arm 15 may then be pulled downwardly to swing the locking cam to its dottedline position, thereby forcing its upper end v against the ropes 80 and confining the ropes between the cam and locking grooves 19 formed in the bracket 68. The ropes 6I! may then be released and the weight of the blind will tend to keep the cam 14 engaged.

Subsequently, whenever it is desired to either f raise or lower the blind. the ropes 60 may be pulled which will unlock the cam and may lthen be further pulled for raising the blind or slackened to lower it.

On the locking rope 18, I provide a. weighted knob while on the ropes 6I) I provide a rectangular buckle-like element 82 having a cross bar so that the ropes 60 may be adjusted relative thereto to facilitate equal draft on'the ropes 60 when raising the blind and thereby lower end level.

'I'he brackets A comprise webs 84 which may be secured by screws or the like to the side jambs Ill or may be secured to the head jamb I2 if desired adjacent its ends. Each bracket A has a supporting ange 86 on 'which the ends of the casing B rest. A back flange 88 is provided to limit outward movement of the casing B when it is ln- 1 serted past inner flanges 90. The flanges 98 are provided for spring latches 92 to snapbehind when the casing is in supported position.

Finger engaging portions', 94 are provided on the latches 92 which can be pulled toward each other when it is desired to remove the casing B from its supported position on the flanges '86.

In Figure 2, the casing B is shown supported between side jambs I8 which are as close together as this length of casing will permit and yet allow room between the ends of the front wall I8 and the anges 90 for the latches 92 to .pass when installing or removing the casing B.

In Figure 3 I have shown the same bracket A in a window frame of slightly greater width. The spring latchesl 92 take -up the difference and close the space between the flanges 98 and the ends of the front wall I8 as clearly shown. Also the resiliency of the latches 92 tends to center the casing B with respect to the brackets A supporting its ends. I'

In Figure 4. I have shown the same casing B installed in a still wider window frame, a bracket A being provided in this case. It is similar to the bracket A except that the flanges indicated at 80a, 88a and 90a. are wider. Thus. it will be obvious that a range of dimensions over an inch or so can be taken care of by a casing of one length and brackets of different sizes.

When interchanging, cleaning, painting,l oiling or the like, it will be obvious that my construction facilitates any of the operations mentioned.l

has many novel features.

keeping its Some changes may be made in the construction and arrangement of the parts of my device without departing from the real spirit and purpose of my invention, and it is my intention to cover by my claims any modified forms of structure or use of mechanical equivalents which may be reasonably included within their scope.

I claim as my invention:

l. In a Venetian blind structure, a pair of rotatable elements, a tape ladder, one strap thereof being wound on one of said rotatable elements and theother strap thereof being wound on the other of said rotatable elements and means for v rotating said rotatable-elements.

2. In a Venetian blind structure, a pair of rotatable elements, a tape 1adder,.one strap thereof being wound on one of said rotatable elements and the other strap thereof being wound on the other of said rotatable elements and means for' simultaneously rotating said rotatable elements.

3. In a Venetian blind structure, a pair of rotatable elements, a tape ladder, one strap thereof being wound on one of said rotatable elements and the other strap thereof being wound on the other of said rotatable elements and means for rotating said rotatable eleinents, said means comprising a drum geared to said rotatable elements and a flexible element having its center wound on said drum and its ends depending therefrom. ,y 4. In a Venetian blind structure, a pair of rotatable elements, a tape ladder, one strap thereof being wound clockwise on one of said rotatableI elements and the other strap thereof being wound counterclockwise on the other of. said rotatable elements and means for simultaneously rotating said rotatable elements in the same direction.

5. In a Venetian blind structure, a casing, a pair of rotatable elements therein, a tape wound on each rotatable element, a-tape ladder, the strapsy thereof being respectively detachably connected with said first mentioned tapes and means for'rotating said rotatable elements.

6. Ina Venetian` blind structure, a rotatable element, a ladder tape having a strap wound thereon, said rotatable element having a slot, said strap having a loop extending through said slot and a pin through said loop.

7. In a Venetian blind structure, a rotatable element. a ladder tape having a strap Wound thereon, said rotatable element having a V- shaped slot, said strap having a loop extending through said slot and a pin through said loop and drawn into said slot.

8. In a Venetian blind structure, a pair of rotatable elements, supporting tapes, one tape being wound on one of said rotatable Velements and the other tape being wound on the other of said rotatable elements and means for rotating said rotatable elements.

I 9. A Venetian blind comprising a support In the form of a housing, means carried by the support and concealed therein for suspending a Venetian blind therefrom, said means being adjustable for varying the angle of inclination of the Venetian blind as and forthe purposes stated.

' 10. In a Venetian blind structure, a pair of rotatable elements, supporting tapes.' one tape being wound on one of said rotatable elements and the other tape being wound on the other of said rotatable elements and means for rotating' said rotatable elements for winding one tape and unwinding the other one.

1l. A Venetian blind comprising a support in the form of a housing, means carried by the support and concealed therein for suspending a 75 tape being wound on one of said rotatable ele-` ments and the other tape being wound on the other of 'said rotatable elements and means for rotating said yrotatable elements.

12. A Venetian blind comprising a support in the form of a housing, means carried by the support and concealed therein for suspending a Venetian blind therefrom, said means comprising a pair of rotatable elements, supporting tapes, one tape being wound clockwise on o ne of said rotatable elements and the other tape being wound counterclockwise on the other of said rotatable elements and means for rotating said rotatable elements inthe same direction.

13. An all metal Venetian blind headconstruction for receiving, supporting and concealing the operating mechanism of a blind having raising ropes, said construction comprising a sheet metal casing, bent to form an upwardly opening channel shaped housing and support, a shft carried upon the bottom of said channel shaped housing and support and concealed between the -walls thereof, plural bearing members for said shaft. said housing having plural pairs o f spaced openings in its bottom"thro`ugh which Venetian blind tape ladders may 'extend for connection with'said shaft, to cause`movement of one side of the tape ladders in one direction-while the other side moves in an opposite direction, means supported within said housing" adjacent and between the openings of each pair of spaced openings for guiding'the raising ropes of the Venetianblind and locking means vforv the Venetian blind within the housing and support whereby the head construction may have the uppermost slat of the blind abut against the outer side of the:bottom of the housing and support when the-slats are fully retracted and may have one edge of the uppermost slat engage the bottom of the housing and support when the slats are in their lowered, closed position.

14. For use with a Venetian blind head bar structure including an initially flat elongated sheet of metal bent to form at least a bottom and a pair of upwardly extending side walls forming a casing, said bottom having a plurality of openings through which the raising ropesof a Venetian blind extend into the casing, pulleys above said bottom wall and 'between said side walls over which said raising ropes extend, said raising ropes after extending over said pu1leys,.depending from said bottom wall through one of said openings;

rope locking means above said bottom wall between said side walls for retaining said rope against retrograde movement while leaving the under side of said bottom substantially free of obstruction for causing the uppermostslat of the Venetian blind to abut against the underside of said bottom when the slats are fully retracted.

- 16. For use with-a Venetianv blin'd structure 4comprising a Venetian blind including raising -for positioning against the underside of a window head lamb, said casing to be closed thereby and having an opening for each rope and for each kside tape of said tape ladders, said ropes and tapes extending through said openings and into said casing; means supported and concealed within said casing for connection with said tapes and'for relatively adjusting them and for said ropes retracted to various degrees and controlelements for the ropes and tapes depending from said casing. l

16. For use with a Venetian blind structure comprising a Venetian blind including raising ropes, tape ladders and a plurality of identically Y similar slats and a three sided sheet metal casing having ,an open top, said casing being adapted for positioning against the underside of a window` head jamb, said casing to be closed thereby and having an opening for each rope and for each side tape of said tape ladders; said ropes and tapes extending through said openings and into said casing, winding and unwinding means supported and concealed within said casing for connection with said tapes and for relatively adjusting them and holding means supported and concealed within said casing to retain said ropes retracted to various degrees and control elements for the ropes andr tapes depending from said l casing.

17. For use with an all metal Venetianblind head unit construction for receiving, supporting, and concealing the operating mechanism of a Venetian blind having slats, tape ladders and raising ropes, said head unit construction being of the type comprising a sheetmetal casing bent to form an upwardly opening, channel shaped housing and support, said housing and support having plural pairs of spaced openings in its bottom through which the tape ladders may vertically extend and other openings through which said raising ropes may vertically extend and having means supported within said housing for guiding the raising ropes; and locking means for said raising ropes supported within the housing whereby the uppermost slat of the blind-may be retained in abutment against the outer side of the bottom of the housing and support when the slats are fully retracted and said uppermost slat may have one edge engage the outer side of the bottom of the housing when the slats are in closed lowered position. l

18. For use with a Venetian blind, a unit coin-I "plete in'itself and comprising an all metal hollow head bar having pairs of spaced openings in its grade movement, journals for said shaft means located closely adjacent said pairs of openings, means of connection between the tapes of said tape ladders and said shaft means, the Venetian blind being supported from the shaft at points in close proximity to the journals for said shaft means: a control element depending from said headbar and gearing within said head bar, said gearing constituting an operative connection be-l tween saidcontrol element and said shaft means for imparting rotation to said shaft means upon adjustment of said element. i

19. For use with a Venetian blind supporting and operating structure comprising a casing-like hollow head bar for supporting the operating mechanism of a Venetian blind, said mechanism being received therein and thereby concealed and comprising shaft means, shaft operating eans, raising rope pulleys and raising rope ocking means; a control element for said shaft operating means, said head bar having an opening through which said control element extends fmi said shaft operating means to a point of access exterior of said head bar, said head bar ha@ pairs of openings for tapes of the tape ladders of a Venetian blind to extend through for winding and unwinding relationship with said shaft means and having other openings to receive the raising ropes of a Venetian blind, said other openings being located adjacent said raising rope pulleys, such ropes extending through said raising rope locking means and depending therefrom to apoint of access exterior of said head bar.

20. For use with a Venetian blind supporting and operating structure including a casing-like` hollow head bar for supporting the operating mechanism of a Venetian blind, said mechanism being received therein and thereby concealed and said head bar having raising rope pulleys and openings to receive the raising ropes of a Ve- V netian blind land located-adjacent said raising rope pulleys, the uppermost 'siat of the Venetian blind being engageable either ilatwise when the blind is fully retracted or edgewise when it is extended and closed against the bottom wall of said head bar; rope locking means within said head bar such ropes extending through said raising rope locking means and depending therefrom, the raising ropes being operable to cause .said uppermost slat to engage ilatwlse against said bottom wall and said rope locking means operable to releasably retain it in such position.

V21. A Venetian blind supporting and operating structure comprising an all metal head unit casing for supporting the operating mechanism of a Venetian blind, said mechanism being received therein and thereby concealed4 and comprising tilting means and raising ropes for a Venetian blind, said casing having .openings through which the tapes of the tape ladders and said raising 'ropes of the Venetian blind extend, the uppermost siat of the Venetian blind being engageable against the bottom wall of said casing either atwise when the blind is fully retracted or edgewise when it is extended andclosed, said raising ropes being operable to cause said ilatwise engagement of said luppermost siat with said casing bottom and said tilting means being operable to cause said edgewise engagement of said uppermost slat with said casing bottom for eliminating light lines between the blind' and casing in both the fully retracted and extended closed positions of the blind.

22. A Venetian blind device comprising an all metal head unit comprising, a casing for receiving, supporting and concealing the operating mechanism therein, tape ladders projecting up into said casing and depending therefromv for carrying slats, the uppermost slat adapted to abut against the underside of said casing when fully retracted and adapted to have one edge engage the underside ofthe casing adjacent one side strap of said tape ladders for eliminating a light line between said head unit casing and said slats when the slats are in either fully retracted -Ol' cled position.

23.- A Venetian blind device comprising a sheet metal casing having at least a bottom and a pair of -upstanding side walls for receiving, supporting and ,concealing therein the operating and supprting means of Venetianblind slats, tape ladders for the slats extending through the bottom and connected to said operating and supporting means, the uppermost siat being slightly spaced from the bottom of the casing to cause either edge o! said slat to engage said bottom near either edge thereof when the uppermost slat is in one of its closed positions.

24. A Venetian blind device comprising a sheet metal casing having at least a bottom and a pair of upstanding side walls for receiving, supporting and concealing the operating and supporting means of Venetian blind slats therein, tape lad'- ders for the slats extending through the bottom and connected to said operating and supporting means, the uppermost slat being slightly spaced from the bottom of the casing to permit either edge of said' slat to engage said bottom near` either edge thereof when the uppermost slat is in one of its closed positions, said' uppermost slat when the slats are fully retracted, engaging ilatwise against said bottom for eliminating a light line between the casing and the slats.

25. In a Venetian blind head bar structure, an initially flat elongated sheet of metal bent to form a casing having at least a bottom and a pair of upwardly extending side walls, said bottom having a plurality of openings through which the tapes of the .tape ladders extend and openings through which the raising ropes of a Venetian blind extend into the casing, rotary means carried by said bottom, spaced thereabove and between said side walls for simultaneouslyy retracting one side and extending the other side of each tape ladder with respect to said casing, pulleys above said bottom wall and between the openings through which said tapes extend, raising ropes extending over said pulleys and depending from said housings through one of said openings.

26. An all metal Venetian blind head unit construction for receiving, supporting and concealing the operating mechanism of a blind having slats,v tape ladders and raising ropes, said head unit construction comprising a sheet metal casing bent to form an upwardly opening, channel shaped housing and support, a shaft carried by said housing and concealed between the walls thereof, bearing members for said shaft'spaced inwardly vfrom the ends thereof, said housing having spaced openings in its bottom throughswhich the tape ladders may vertically extend and having other openings through which the -raising ropes may vertically extend, means of connection between points spaced from the axis of said shaft and said tape ladders to cause movement of one side of the tape ladders upwardly while the other side `simultaneously therewith moves downwardly and means supported within said housing for guiding the raising ropes.

2'7.` An all metal Venetian blin'd head unit construction for receiving, supporting and concealing the operating mechanism of a blind having slats, tape ladders and raising ropes, said head unit construction. comprising a sheet metal'casing bent to form an upwardly opening, channel shaped housing and support, a shaft carried by said housing and concealed between the walls thereof, bearing members for said shaft spaced inwardly from the ends thereof, said housing having spaced openings in its bottom through which the tape ladders may vertically extend and having other openings through which the raising ropes may vertically extend, quickly detachable means of connection between points spaced from the axis of said shaft and` said tape ladders to cause movement oi' one side of the tapel ladders upwardly `while the other side simultaneously therewith moves downwardly and means support- -ed within said housing for guiding the raising therein and thereby concealed and comprising shaft means, shaft operating means, raising rope pulleys, a control element for said shaft operating means, said head bar having pairs' of openings for tapes of the tape ladders of a Venetian blind to extend through, said tapes being operatively connected with said shaft means for simultaneous retraction of one tape and extension of the other tape relative to the shaft means and having other openings to receive the raising ropes of a Venetian blind, said other openings being located adjacent said raising rope pulleys, such ropes extending through said raising rope pulleys and. depending from said head bar, the uppermost slat of the Venetian blind being engageable either atwise when the blind is fully retracted or edgewise when it is extended and closed against said head bar. and said control element through said shaft means being operable to cause said slat to engage edgewis'e against said head bar. A

Y 29. In a Venetian blind structure, an all metal head construction comprising a channel shaped the purposes stated.

' said shaft elements will cause one side of the tape ladders to move into said casing and the other side to extend outwardly therefrom for adjusting the Venetian blind slats to any angle of adjustment and raising means for bundling the slats comprising pulley wheels within said casing and positioned midway between said shaft elements over which an operating cord extends as and for I PETER. fr; KUYPER.

DISCLAIMER Re. 20,133.Peter H. Kuyper, Pella, Iowa.

Patent dated October 20, 1,936. the asslgnee, Rolscreen Company.

VENETIAN BLIND CONSTRUCTION. Disclaimer filed October 28,` 1938, by

Hereb enters this disclaimer to claim 9 of said specification. `ffic'ial Gazette November 22, 1938.]

therein and thereby concealed and comprising shaft means, shaft operating means, raising rope pulleys, a control element for said shaft operating means, said head bar having pairs' of openings for tapes of the tape ladders of a Venetian blind to extend through, said tapes being operatively connected with said shaft means for simultaneous retraction of one tape and extension of the other tape relative to the shaft means and having other openings to receive the raising ropes of a Venetian blind, said other openings being located adjacent said raising rope pulleys, such ropes extending through said raising rope pulleys and. depending from said head bar, the uppermost slat of the Venetian blind being engageable either atwise when the blind is fully retracted or edgewise when it is extended and closed against said head bar. and said control element through said shaft means being operable to cause said slat to engage edgewis'e against said head bar. A

Y 29. In a Venetian blind structure, an all metal head construction comprising a channel shaped the purposes stated.

' said shaft elements will cause one side of the tape ladders to move into said casing and the other side to extend outwardly therefrom for adjusting the Venetian blind slats to any angle of adjustment and raising means for bundling the slats comprising pulley wheels within said casing and positioned midway between said shaft elements over which an operating cord extends as and for I PETER. fr; KUYPER.

DISCLAIMER Re. 20,133.Peter H. Kuyper, Pella, Iowa.

Patent dated October 20, 1,936. the asslgnee, Rolscreen Company.

VENETIAN BLIND CONSTRUCTION. Disclaimer filed October 28,` 1938, by

Hereb enters this disclaimer to claim 9 of said specification. `ffic'ial Gazette November 22, 1938.] 

